3-Digit Addition and Subtraction Mastery
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3-Digit Addition and Subtraction Mastery
Year 5 Mathematics Building confidence with larger numbers Real-world problem solving
Understanding Place Value
Hundreds, tens, and ones columns Each digit has a specific value Foundation for all calculations Visual representation helps understanding
Place Value Practice
Break down 3-digit numbers Use place value charts Work with partner to check answers Try numbers like 347, 582, 196
3-Digit Addition Without Regrouping
Add ones column first Then tens column Finally hundreds column No carrying needed for these examples
3-Digit Addition With Regrouping
Sometimes we need to 'carry' numbers When a column adds to 10 or more Write the carried number above Practice makes perfect!
Addition Challenge
Solve 5 addition problems Mix of regrouping and non-regrouping Check your work with a partner Raise hand when finished for teacher check
3-Digit Subtraction Strategies
Start with the ones column Sometimes we need to 'borrow' Borrowing from the tens column Check by adding back
Real-World Problem Solving
A school has 456 books in the library They buy 178 more books Then 89 books are damaged and removed How many books are left?
Mixed Practice Strategies
{"left":"Read the problem carefully\nIdentify if it's addition or subtraction\nSet up the calculation properly","right":"Always check your answer makes sense\nUse estimation to verify\nShow all working clearly"}
Mastery Assessment
Complete 8 mixed problems 4 addition, 4 subtraction Include real-world contexts Show all working clearly Time limit: 20 minutes